// (c) Copyright Ascensio System SIA 2010-2022
//
// This program is a free software product.
// You can redistribute it and/or modify it under the terms
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
// any third-party rights.
//
// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For details, see
// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
//
// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
//
// The  interactive user interfaces in modified source and object code versions of the Program must
// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
//
// Pursuant to Section 7(b) of the License you must retain the original Product logo when
// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
// trademark law for use of our trademarks.
//
// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode

namespace ASC.Web.Core.Users;

public class UserInfoComparer : IComparer<UserInfo>
{
    public static readonly IComparer<UserInfo> Default = new UserInfoComparer(UserSortOrder.DisplayName, false);
    public static readonly IComparer<UserInfo> FirstName = new UserInfoComparer(UserSortOrder.FirstName, false);
    public static readonly IComparer<UserInfo> LastName = new UserInfoComparer(UserSortOrder.LastName, false);


    public UserSortOrder SortOrder { get; set; }
    public bool Descending { get; set; }


    public UserInfoComparer(UserSortOrder sortOrder)
        : this(sortOrder, false)
    {
    }

    public UserInfoComparer(UserSortOrder sortOrder, bool descending)
    {
        SortOrder = sortOrder;
        Descending = descending;
    }


    public int Compare(UserInfo x, UserInfo y)
    {
        var result = 0;
        switch (SortOrder)
        {
            case UserSortOrder.DisplayName:
                result = UserFormatter.Compare(x, y, DisplayUserNameFormat.Default);
                break;
            case UserSortOrder.FirstName:
                result = UserFormatter.Compare(x, y, DisplayUserNameFormat.FirstLast);
                break;
            case UserSortOrder.LastName:
                result = UserFormatter.Compare(x, y, DisplayUserNameFormat.LastFirst);
                break;
        }

        return !Descending ? result : -result;
    }
}
